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Finding the Fourth Proportional to 636.84, 871.32 and 634.44

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Solution

The fourth proportional to 636.84, 871.32 and 634.44 is: 868.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.84 : 871.32 = 634.44 : x
  2. Step 2: Convert to fraction form
    636.84/871.32 = 634.44/x
  3. Step 3: Cross multiply
    636.84x = 871.32 × 634.44
  4. Step 4: Simplify right side
    636.84x = 552,800.26
  5. Step 5: Solve for x
    x = 552,800.26/636.84
  6. Step 6: Final answer
    x = 868.04

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.